The complete mitochondrial genome sequence of Rikuzen flounder, Dexistes rikuzenius (Jordan & Starks, 1904)

In this study, the complete mitochondrial genome of the Rikuzen flounder ( Dexistes rikuzenius ) using next-generation sequencing and bioinformatics analysis is presented. The mitogenome was found to be a circular molecule 17,494 bp in length, containing 13 protein-coding genes (PCG), 22 transfer RNA (tRNA) genes, two ribosomal RNA (rRNA) genes, and one control region (D-loop). Proportional nucleotide composition was A: 28.80% (5,039 bp), T: 26.51% (4,638 bp), C: 28.72% (5,025 bp) and G: 15.96% (2,792 bp), with a combined A+T content of 55.32%. The phylogenetic relationships of the taxon with 19 other flatfish species in the order Pleuronectiformes were then analyzed based on the 13 PCGs. Dexistes rikuzenius was most closely clustered with Cleisthenes herzensteini within this order, suggesting a close relationship.